View thumbnails with annotations in WPF

In This Topic

WpfAnnotatedThumbnailViewer class, a WPF control - inheritor of WpfThumbnailViewer class, is intended for viewing image thumbnails with annotations.

WpfAnnotatedThumbnailViewer class extends the functionality of WpfThumbnailViewer class and allows to:

get access to annotation data collection of any thumbnail using WpfAnnotatedThumbnailViewer.AnnotationDataController property
get access to annotation type collection of any thumbnail using WpfAnnotatedThumbnailViewer.AnnotationViewController property
switch on/off the showing of annotations on thumbnails using WpfAnnotatedThumbnailViewer.ShowAnnotations property

Here is an example showing how to load images with annotations from file and display their thumbnails with annotations:

VB.NET

' The project, which uses this code, must have references to the following assemblies:
' - Vintasoft.Imaging.Annotation.Wpf.UI

Private Sub LoadImagesWithAnnotation(wpfAnnotatedThumbnailViewer As Vintasoft.Imaging.Annotation.Wpf.UI.WpfAnnotatedThumbnailViewer, filename As String)
    wpfAnnotatedThumbnailViewer.Images.Add(filename)
End Sub

// The project, which uses this code, must have references to the following assemblies:
// - Vintasoft.Imaging.Annotation.Wpf.UI

void LoadImagesWithAnnotation(
    Vintasoft.Imaging.Annotation.Wpf.UI.WpfAnnotatedThumbnailViewer wpfAnnotatedThumbnailViewer, string filename)
{
    wpfAnnotatedThumbnailViewer.Images.Add(filename);
}

WpfAnnotatedThumbnailViewer class can be used separately or together with AnnotationViewer class.

If WpfAnnotatedThumbnailViewer class is used separately then it just shows annotations on thumbnails.

If WpfAnnotatedThumbnailViewer class is used together with AnnotationViewer class then it shows annotations on thumbnails and, at the same time, performs simultaneous update of active image thumbnail in AnnotationViewer when annotations associated with the thumbnail are changing (new annotation is added, existing annotation is transformed, etc).

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